Use the correct form of the words given
1.It is very (polite) ________ of you to make a lot of noise in class
2.We will need to use (renew) _________ energy in the future when the fossil fuels are depleted
3.We need to use many (chemistry __________ subtances in production
4.There are a few (technique) ______ that are still working in the lab
5.Do you know some of the most famous (invent) _________ in the world?
SoS
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